86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
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var fs = require('fs');
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var URL = require('url');
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var child_process = require('child_process');
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var micro = require('micro'), formidable = require('formidable');
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var logit = require('./_logit'), cors = require('./_cors');
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var json2csv = require('json2csv');
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var data = "a,b,c\n1,2,3".split("\n").map(function(x) { return x.split(","); });
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var xlsx = '../../bin/xlsx.njs';
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function get_data(req, res, type) {
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var file = "_tmp." + type;
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/* prepare CSV */
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var csv = json2csv({data:data, hasCSVColumnTitle:false});
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/* write it to a temp file */
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fs.writeFile('tmp.csv', csv, function(err1) {
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/* call xlsx to read the csv and write to another temp file */
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child_process.exec(xlsx+' tmp.csv -o '+ file, function(err, stdout, stderr){
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cors(req, res);
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/* read the new file and send it to the client */
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micro.send(res, 200, fs.readFileSync(file));
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});
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});
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}
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function get_file(req, res, file) {
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var csv = json2csv({data:data, hasCSVColumnTitle:false});
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fs.writeFile('tmp.csv', csv, function(err1) {
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/* write to specified file */
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child_process.exec(xlsx+' tmp.csv -o '+file, function(err, stdout, stderr) {
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cors(req, res);
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micro.send(res, 200, "wrote to " + file + "\n");
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});
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});
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}
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function post_data(req, res) {
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var form = new formidable.IncomingForm();
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form.on('file', function(field, file) {
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/* file.path is the location of the file in the system */
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child_process.exec(xlsx+' --arrays ' + file.path, post_cb(req, res));
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});
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form.parse(req);
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}
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function post_file(req, res, file) {
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child_process.exec(xlsx+' --arrays ' + file, post_cb(req, res));
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}
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function post_cb(req, res) {
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return function(err, stdout, stderr) {
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cors(req, res);
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/* xlsx --arrays writes JSON to stdout, so parse and assign to data var */
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data = JSON.parse(stdout);
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console.log(data);
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return micro.send(res, 200, "ok\n");
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};
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}
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function get(req, res) {
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var url = URL.parse(req.url, true);
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if(url.pathname.length > 1) micro.send(res, 404, "File not found");
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else if(url.query.t) get_data(req, res, url.query.t);
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else if(url.query.f) get_file(req, res, url.query.f);
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else micro.send(res, 403, "Forbidden\n");
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}
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function post(req, res) {
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var url = URL.parse(req.url, true);
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if(url.pathname.length > 1) micro.send(res, 404, "File not found");
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else if(url.query.f) post_file(req, res, url.query.f);
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else post_data(req, res);
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}
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module.exports = function(req, res) {
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logit(req, res);
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switch(req.method) {
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case 'GET': return get(req, res);
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case 'POST': return post(req, res);
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}
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return micro.send(res, 501, "Unsupported method " + req.method + "\n");
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};
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